Crust: Mix graham cracker crumbs, sugar substitute, and melted butter. Press into an 8x8-inch pan. Chill.
Filling: Beat cream cheese, powdered sugar, and vanilla until smooth. Fold in light whipped topping.
Topping: Cook strawberries, sugar substitute, lemon juice, cornstarch, and water until thickened. Cool slightly. Spread filling over crust, top with strawberry mixture. Refrigerate for 4 hours until set. Cut into bars and serve.
This makes 12 thick bars. On WW, each bar is 7 WW Points. Enjoy!